Pneumatic press for cementing soles on shoes



June 11, 1935. .1. 1.. THOMPSON PNEUMATIC PRESS FOR CE MENTING SOLES ON SHOES Filed July 30, 1932 Patented June 11, 1935 UNI-TED PNEUMATIC PRESS FOR CEMENTING SOLES N SHOES John L. Thompson, Somerville, Mass, assignor I of one-half to George Laganas, Lowell, Mass, 120115111 one-half to Lena A. Wilson, Somerville,

ass.

Application July 30, 1932, Serial No. 626,397 Claims. (CI. 12 33) My present invention relates to pneumatic Within the covering l5 and between the covpresses for use in cementing outer soles on shoes. ering andin'ner side of the base ID are placed a 8 I am aware that pneumatic presses of pair of pneumatic tubes I! each provided with a this character are not broadly new, yet, in most valve 58 through which the tube is inflated; A

5 prior devices it has been necessary for the operbinding strap it is secured'to the base and holds ater in inflate the press after placing the shoe the covering i5 securelythereto'alongthe cenin its proper position, and while this method is tral portion between the two pneumatic tubes.

- efliectiveand produces the same result, much time The rear flange H is further provided with a is consumed in small shops not equipped with strap member is under which the back edge of 10 continuous air pressure. 1 the covering I5 is secured. Y I

n my present invention I have developed a The upper structure'of'theipress comprises a pneumatic press which may be continuously inclamping bridge member 2?] horizontally disposed flated, or in other words is never deflated from across the press and provided at either end with one operation to another and which is very fast vertical rod members 2! terminating at their in p ra i n. lower extremities with offset clamp members 22 15 The principal object in my invention is an imadapted to fit under the edge of the flanges l3 at proved pneumatic press for shoes and the like either side of the press. l where outer soles are to be cemented to the shoe. As shown in Fig. 1 the press consists of two It is also an object to provide a device of the units such that a pair of shoes may be operated character set forth in which the shoe contacting upon at a time as is usually the requirement but 20 element of the clamping means which holds the for purposes of description the description of one Shoe in he inflata l element is adjustable will sunioe for both each being a duplicate of the to accommodate for different positions of the other. 1 same shoe and easily replaceable to accommodate Directly over the center of the pneumatic tube 25 for shoes of different size, yet in which such ele- H is the clamping mechanism which holds the 25 ment is positively supported by the clamping shoe in place while the cementing operation is in mechanism when in unclamped position. progress. This mechanism comprises a bridge It is a further object to provide an improved member 23 having integral downwardly extending inflatable structure in which the pneumatic tube. toe piece 2i and an integral downwardly extendwill be positively held in its proper position at all ing heel piece 25, the upper surface of which 30 times and at the a t me protected from detebridge member is formed with a dovetail slideway rioration due to wear, u e, d s etc. adapted to receive the ball end of a threaded Ot r bj cts and novel features comprising shaft member 25, such that the bridge 23 may be the construction and p a i of my i vention adjusted in any position longitudinally on the Will pp as the d s p n 0 the Same D pneumatic cushion which the operatordesires. 35

grosses. One end of this slideway'is left open so as to per- R fe rin t the draw n i lustrati my in nmit the ready removal of the bridge member 23. tion: For the sake of convenience in referring .to'the Fig. 1 is a plan view of the press in operation, slideway, the term innermost wall may be used 40 and to denote that inner wall of the slideway which 4,0

2 is Cross-Section taken on the line is directly opposite and parallel to the open side. of of 1 showing the press in operation the slideway and which in the present embodi- Referring more in detail to the "I ment as showninFigureZis the bottom wall of the mdlcates the the base castmg Whlch slideway. The threaded shaft 26 is engaged in a 5 is supported at the rear by a flanged portion H, threaded O 4r pening in a boss 27 located in the upper O igg g g s gfi g g 55 525 311 5 53 5; bridge member 29 and is further provided on its member l3 to which are bolted binding straps M. top with a of handlestzs' 1 t 30 Between the binding straps i l and flange I3 is In m w shoe 29 firs havmg as placed a protective covering l5 which is securely mselited Wlthm 1t 15 place? upon the pneumajtlc held between t flanges |3 and H and the bind cushion, then the shaft 26 is screwed down with jng traps |4 T binding straps g4 also extend the toe piece 2c and heel piece 25 in contact re-. down over the back of the press to the edge of spectively with the toe of the shoe and the heel of the flange I l and throughout their entire length the last, thus compressing the pneumatic tube I1 55 are provided at intervals with holding bolts l6. and sinking the bottom of the shoe with the sole 55 piece 3| into the cushion provided by the pneumatic tube until the entire bottom surface of the sole3l is in contact and under pressure of the cushion.

To release the press all that is necessary is to reverse the screw shaft 26 a few revolutions and the press isready foranoth'er operation. A

If desired the clamp members 22 may be solidly attached to the bottom as shown so that the bridge 2|) may be easily adjusted.

Having thus described my invention what I claimasnewis:

1. In a pneumatic pres soles, a base portion, a flexible air container member mounted against said base, a lower bridge member adapted to engage the toe of a shoe sup-"' ported by said container and the upper heel portion of a last inserted in said shoe, said bridge member having a dovetail slideway on the upper side of and extending longitudinally thereoi, an upper bridge member positioned above said container, and a compression screw threadedly engaging "said upper bridge member and having a rounded enlarged endportion in slidable interlocking engagement with said dovetail slideway on the lower bridge member, whereby said lower bridge member will be supported by said compression screw when in its unclamped position and may be adiustedirelative thereto to properly engage a shoe and last. r

2. In'taxpneumatic' press for cementing shoe jsoles, a base, an inflatable structure mounted thereagainst, said base and said structure having coacting parts ior'anchoring the structure to the sides, front, and rear of thebase, a lower bridge member having downwardly extending spaced parallel integral parts adapted to engage the toe l of a shoe'supported by said container and the upper heel portion of a last inserted in said shoe,

said'bridge member having a dovetail slideway on the upper side of and extending longitudinally thereof ,an upper bridge member positioned above said container, and a compression screw threadedly engaging said upper bridge member and having an enlarged end portion in slidable interlocking engagement with said dovetail slideway on the lower bridge member, whereby said lower bridge member will be supported by said compression screw when in its unclamped position and may be adjusted'relative thereto to properly engage a shoe and last.

" 3. In a'pneumatic; press for cementing shoe soles, a base portion, a flexible air container member mounted against said base, a lower bridge member adapted to engage the toe of a shoe sup-- ported by said container'and the upper heel porof the flanges l3 but I on the lower bridge prefer to leave them detachably connected thereto for cementing shoe 7 row portion and open'atoneend'topermit ready removal of said lower bridge member from the compression screw.

- 4. In a pneumatic press for shoe soles, a base portion, a flexible air container member mounted against said base portion, a lower bridge adapted to engage the toe of a shoe supported by said container and the upper heel portion of a last insertedin said shoe, an upper-bridge positioned above said lower bridge, a d a compression screw threadedly engaging said upper bridge, said lower bridge and the lower end of said screw having coacting parts for slidably securing said lower I bridge to the lower end of said screw, one of said parts having a slot opening, toward the other 'part and forming a slideway and having portions projecting fromthe sides of said slot at a'position spaced from the innermost wall thereof, and the other of said parts havinga reduoed'portion 'extending between said projecting portions and an enlarged portion 'carried'by said reduced portion and positioned'in said slideway inwardly of said projecting portions, whereby said enlargedportion will be slidably, retained ,within said slideway to slidably support said lower bridge from the lower end of said screw. 7 v 5. In a pneumatic press for shoe-soles, a base portion, a flexible air container member mounted against said base portion, a lower bridge element adapted to engage thetoe of 'a shoe and the upper heel 1 portion of a last inserted in "said shoe, an upper bridge member positioned above said element, a compression element threadedly engaging said upper bridge member, one of'said elements being provided'with a slot constituting a slideway, said slideway having a'portion at a position remoteirom its innermost wall which is relatively narrower than the portion adjacent said wall, and the other of said elements having a part extend ing into, said slideway through said relatively nar'-' having an enlarged part positioned inwardly. ofs'aid relatively narrow-portion and coacting therewith for slidablysupporting said lower bridge element on the lower end 'ofsaid compression element; i i

' JOHNL. THOMPSON; 

